Valve.



PATENTED DEC. 24, 1907..

G. W. BAILEY.

VALVE. IOATION FILED APB.19.190'I.

lllzmum GEORGE W. BAILEY, OF WASHINGTON, DISTRICT COLUMBIA VALVE.

r gs eeinmion of Letters Patent.

Application an A r-ir s. i901. smart. 869.160.

Patented nee. 24, 1907.

To all whom it 'may concern: a

Be it known that I, GEORGE W. BAILEY, a citizen of the United States,residing at Washington, in the District of Columbia, have inventedcertain new and useful Imrovements in Valves, of which the following 1sa full, clear, and exact specification-. j

The object of the present invention to' provide a valve that will standthe wear andtear as well as an metal valve and yet-will close tightly atal tlmes.

lleretofore attempts have been made toproduce a tight closing of metalvalves by lining with leather or rubber the part of the valve platecoming in contact with and striking the seat, but the lining is workedaway very quickly by the continuous action and the heavy blows of thevalve plate. Attempts have also been made to rovide the extreme edge ofa valve plate with a gasket in such a way, blow of the valve plate,butit has been-found in practice that a lower-pressure is notsufficient toforce the rubber gasketv sufliciently against the seat and leakage ofthe valve can not be prevented. a

The present invention purports to obviate these inconveniences, and toreduce a valve thatwill keep tight under a1 pressures, that will preventthe rapid wearing off of the gasket, metallic parts of the valve platecontact: ing with the metallic valve seat, and which by its peculiarpacking will form a cushion so that the metallic parts strike upon eachother with a softened blow.

In the accompanying drawing forming part of this specification, Figure 1shows 1nlongitudinal section an ordinary check valve provided with myimprovement, Fig. 2 shows at an enlarged scale and in section the valveseat and the valve plate with the gasket. Fig. 3 is the same view andshows thevalve plate under pressure upon thev'alve seat and the gasketcompressed.

The valve plate 1 1s guided by its stem 2 in p the valve casing 3 in theordinary well known manner.

The lower face of the" valvelate 1 at the edge being opposite to the vave seat- 4, is provided with a deep annular undercut groove 5 shown inthe example as approxi-.

mately of semi-circular cross-section. The edges of the groove arerounded as shown at 6 for a purpose to be explained below; Thus thegroove is widened out at its opening and that it is not exposed to the"'evidently a ring or gasketv of rubber of circu in or cylindricalcross-section can easily be forced into the groove and will be retainedherein by the undercut edges which extend a little beyond thesemi-circular shape as can be clearly seen in Fig". 2. The rubber gasketis perferably so shapedthat the part not being sealed in the valve plateprojects somewhat beyond the surface of the valve plate, so that part 6when the valve closes will strike the seat 4-fi1St and the gasket willbe flattened till the metal parts of the face of the valve come incontact with the seat. In this way the valve plate is cushioned and thejerk under heavy pressure will be greatly moderated. The rounded edges 6forming a widening of the opening of'the groove permit the rubber todistend and therefore the rubber gasket can not be worked away as inordinary leather lined valve plates, since the metal of the valve platecomes continually in contact with the metal of the seat. The whole loadof pressure acting upon the valve plate is transferred on the gasketwhich is therefore. flattened and extended as explained untilthemetallic contact of the valve parts prevents any further destructivedistention. This valve olfers also the advantage that the valveplateneed not be ground upon the valve seat. 1 Both contacting since theelastic gasket is so tightly pressed under the full load of the waterpressure against the seat that it must keep absolutely tight anddetrimental compressing of the distended rubber gasket cannot occursince the of the water pressure, which keeps the confined gasket in apartly compressed position, flattened on the seat and distended in theenlargements 6 so that a leakage cannot occur.

its confinement forms a tight joint on the valve seat, and how theinnermetallic edge of .thevalve plate by contacting with the valve seatprevents a compression of the gas; ket which would be apt to quickl thecontacting rubber j parts. he latter when the valve reopens.takesimmediately the."natural rounded form as in Fig. 2; Fig.3'shows"also that the outer metallic ed e of the valve plate may be madeto stand ack -from'the face of the valveplate so that the inner edgealone comes in contact with the valve seat.

surfaces can remain rough metal parts when contacting take all the load1 Fig. 3 illustratesthat the rubber gasket in Having thus described myinvention, what face of the valve plate to receive the impact I lai ithereof, and adapted to be distended later- 1. In a valve, a valve plateof greater dially into the enlargements b contact with ameter than theport surrounded by the l the valve seat, and under t e full load ofvalve seat, an annular groove in the face of pressure bearing upon thevalve late. the valve plate near its edge and op osite 3. In a valve avalve plate 0 greater di- 4 the valve seat an enlargement or W1 eningameter than the port surrounded by the of the groove near its openingedges, metallic valve seat, an annular groove in the face of bearingsurfaces on the sides of said edges, an the valve plate near its edgeand opposite annular packing ring or gasket in said oove the valve seathaving a bottom of semi-cyand normally projecting beyond the ace oflindrical cross-section and an enlargement or the valve plate to receivethe impact thereof, widening of the groove near its opening and adaptedto be distended laterally into edges, ametallic bearing surface on theinthe enlargements by contact with the valve side of the opening of saidgroove, an annuseat, and under the full load of pressure bearlar packingring or gasket of cylindrical ing upon the valve plate; cross-section in,said oove and normally 2; n a valve a valve plate of greaterdiprojecting beyond the ace of the valve plate ameter than the portsurrounded by the to recelve the impact thereof, and adapted valve seat,an annular groove in the face of to be(distended laterally into theenlargethe valve plate near its edge and opposite men'ts by contact withthe valve seat, and the valve seat having a bottom of semi-cyunder thefull load of pressure bearing upon lindrical cross-section and anenlargement the valve plate. or widening of the groove near its openingIn testimony whereof I afiix my si nature.

edges, metallic bearing surfaces on the sides GEORGE W. BAI EY. of saidedges, an annular packing or In the presence of gasket of cylindricalcross-section in said GEo. HEINIKE,

groove and normally projecting beyond the G. DITTMAR.

